The subsolidus phase relations of the ZnO-BaO-V2O5 ternary systems were investigated by means of X-ray diffraction analysis. There are three ternary compounds, nine binary compounds and sixteen 3-phase regions found in this system. The crystal structure of the ternary compound Ba2ZnV2O8 was refined by Rietveld profile fitting method and the powder diffraction pattern is given. A new ternary compound Ba3.4Zn0.8V4O14.2 has been found by the powder diffraction pattern.
